7.The Caithreim has “westwards to Gleann Caoin” but this is certainly a mistake,
for Gleann Caoin lies in the Parish of Killineeboy to the southeast of
Slieve Carn. In one copy of the Caithreim, Gleann Caoin is omitted, and
it is simply stated that Donogh O’Brien was marching westwards
when he was killed.